Covid-19: Is the Pfizer vaccine effective against the Delta variant?
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Vaccine maker conducting studies on a prototype jab against future variants
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Vaccine maker conducting studies on a prototype jab against future variants
Full ArticleThe Delta variant is the fast-moving strain of the coronavirus now found in 96 countries. It's expected to be the dominant variant..
Sub-Saharan Africa is in the grips of a third wave of COVID-19 infections that threatens to be even more brutal than the two that..